塔南—南贝尔凹陷南屯组下部沉积体系平面展布特征

Depositional system of lower Nantun Formation in South Tamuchage-South Beier Sag

纪友亮 蒙启安 单敬福 张革

Ji Youliang Meng Qi'an Shan Jingfu Zhang Ge

中国石油大学(北京)地球科学学院, 北京102249 2. 中国石油大庆油田勘探开发研究院, 黑龙江大庆163712 3. 长江大学地球科学学院, 湖北荆州434023

College of Geosciences, China University of Petroleum, Beijing 102249, China 2. Research Institute of Petroleum Exploration and Development, Daqing Oilfield, PetroChina, Daqing, Heilongjiang, 163712, China 3. Faculty of Earth Sciences & Information, Yangtze University, Jingzhou, Hubei 434023, China

根据岩心、钻井、地震、分析化验等资料,对塔木察格盆地塔南—南贝尔凹陷南屯组下部沉积体系进行了综合研究。研究结果表明,塔南—南贝尔凹陷主要发育以坡降大、近物源、多物源为特征的扇三角洲、近岸水下扇、湖底扇和湖泊沉积体系。其中扇三角洲、近岸水下扇和深湖泥岩沉积是研究区内最为发育的沉积体系类型。综合利用各种地震相分析、地震属性分析、砂岩百分含量、重矿物等资料,对塔南—南贝尔凹陷南屯组下部的沉积体系平面展布特征进行了论证。

Based on the data of core,well drilling,seismic and laboratory chemical analyses,the depositional system of the lower Nantun Formation in the South Tamuchage-South Beier Sag is discussed.Fan-delta,near-shore subwater fan,lake floor fan and lacustrine depositional system characterized by steep slope,near source and multi source account for large scales in the study region.Fan-delta,near-shore subwater fan and deep-lake mud deposits are the most developed sedimentary systems.According to the analyses of seismic facies,seismic features,sandstone contents and heavy minerals,it is discussed in this paper the depositional distribution characteristics of the lower Nantun Formation in the South Tamuchage-South Beier Sag.

国家科技重大专项(2011ZX05009)资助

https://doi.org/10.11781/sysydz201103260